Blue Wave NS492 12-mil Solar Blanket for Oval Above-Ground Pools, 12-ft x 24-ft, Clear EFFECTIVE HEAT SOURCE - This 12-mil blanket uses solar heating to raise the temperature of your swimming pool by up to 15 degrees Fahrenheit. RETAINS HEAT - Thermal cells trap heat through cool nights and cloudy days, making this cover effective all summer long. CONSISTENT PERFORMANCE - Our products are created for the outdoors. This Oval 12-mil Solar Blanket for Above-Ground Swimming Pools withstands repeated exposure to UV radiation and chemicals. 5-YEAR WARRANTY - Your product comes with a 5-year manufacturer warranty. Your item will arrive damage free with all necessary parts and accessories. If something goes wrong, we'll work tirelessly until you're satisfied with your product. DIMENSIONS - 12-ft W x 24-ft L x 0.5-in H